The provided document contains a series of questions and answers related to geology, petrology, mineralogy, and soil science. It covers topics such as types of rocks, geological processes, elements in the Earth’s crust, and notable geological landmarks. Other subjects include historical figures in geology, notable geological events, and specific gemstones and minerals. Additionally, there are questions about geographical features and plate tectonics.
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When the molten lava comes on the earth's surface, it rapidly cools down and becomes solid. Rocks formed in this way on the crust are extrusive igneous rocks. Sometimes the molten magma cools down deep inside the earth's crust. Solid rocks so formed are the intrusive igneous rocks.
When the molten lava comes on the earth’s surface, it rapidly cools down and becomes solid. Rocks formed in this way on the crust are extrusive igneous rocks.
Sometimes the molten magma cools down deep inside the earth’s crust. Solid rocks so formed are the intrusive igneous rocks.
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